Archeops is a beast, and the main point of Archeops is the hit hard, and hit fast.

Archeops (Any gender)

-Ability: Defeatist (Deal with it, you have no choice)

-Nature: Adamant

-Item: Flying Gem

Moveset

Acrobatics - STAB and Flying Gem Boost = App. 124 Base Power (The Flying Gem activates before the move is used, so that's how you get the boost. After the Flying Gem is used up, Archeops can still hit hard with Acrobatics)

Steel Wing/ U-Turn = 70 Base Power (Though it's not much, steel wing can sometimes boost your defence, and U-turn can make for a quick exit)

Rock Slide - STAB = App. 113 Base Attack (Great move, and will often make the target(s) flinch, since Archeops is likely to go first. Also a great help against ice types)

Earthquake - 100 Base Power (How does a bird create an earthquake I do not know, but this move is awesome with Archeops. Great type coverage: Steel, Electric, and Rock. Three opponents of Archeops.

As for Ev's max out Attack, and Speed, since your going to be mostly using them. The rest can go into HP and the Defences.

**-AncientPower STAB + 10% to raise all stats
-Earth Power Coverage and 10% chance to lower Sp. Def.
-Focus Blast More Coverage and 10% chance to lower Sp. Def.
-Hidden Power (Ice)** **Coverage aginst Gliscor, Dragonite and the like that could wall it**.

Evs make each Attack stat 319. That's pretty good. Acrobatics is a given STAB, and with the Flying Gem, it takes out bulky Fighting types like Conkeldurr easy. Rock Slide is also STAB, and also covers Ice weakness, which is pretty nifty. Earthquake is AWESOME, and covers other Rock types, along with Electric and Steel types. HP Grass completes this prehistoric monster by covering levitating Rock types, and covering Water types. Also covers Ground types in case of Gravity and if this guy survives Smack Down. You gotta admit, this set is pretty unexpected...

Stone Edge gives a nice 150 base power on top of archeops 568 attack stat with choice band (!!!!)Earthquake gives nice coverage.Dragon Claw is there for dragon that think they can come in and start boosting with dragon dance and get away with it.U-Turn is nice scouting, it gives some coverage as well.

My fav RU attacker is right here! he does kinda suck, but with a good set, he can shine!

Archeops @ Flying Gem
Defeatist
Jolly
252 Atk/ 4 Def/ 252 Spe

Head Smash
Acrobatics
Earthquake
U-Turn

Simple, yet effective, and super effective! He can pick his move of choice to hopefully OHKO the opponent. If he doesn't OHKO them, then he maims them for life! Head Smash is STAB and hits like a freight train. Anything that does not resist it dies. Acrobatics is also STAb and BAWS with the flying gem. Earthquake completes the EdgeQuake set. And U-Turn is for scouting and hitting a lot of stuff really hard.

Archeops has been one of my favorite and most used Pokemon in the Black and White series of games. This moveset and items are mostly for an offensive attack first, and attack hard kind of Archeops. (like someone said previously) The move Acrobatics is a good move to have for this guy. Combined with the Flying Gem item which will boost its attack, this move has a 55 base power + more damage if your enemy has no held item. The move inflicts even more damaged if used with the Flying Gem item making it one of the best Flying type move/item combo in the game. Also this move has STAB.
The next move Dragon Claw is also good because its 80 base damage may not be strong but this move is a good finisher/backup type move. Its Dragon type also adds alot of move combos and offensive possibilities. This move can be replaced by almost any move you want because its the last choice/replaceable move. Earthquake is a brilliant move to have Archeops learn because of the coverage it gives this Pokemon. It inflicts tremendous damage against three of this guys weaknesses. Ice/Electric/Rock. The last move Ive been using with my Archeops is Rockslide. Along with the STAB this move is good against Ice types which are one of Archeop's most dangerous foes.

Pluck is great in LC, as you may know. U-Turn gets it away from Defensive Walls, Rock Slide is STAB, and I figured Attract could buy it some time to get around Defeatist, especially when coupled with the wonderful item Leftovers.
I might post a Tailwind set later. :)

Thanks to Archeops ability, once this thing gets below half HP its Attack + Special Attack stats are cut in half meaning it's left useless for the rest of the battle. This set is a PokeBank OU set. If Archeops got any other ability other than Defeatist it would be all over the place with it's immense 140 base Attack stat along with 112 base Special Attack and 110 base Speed which are certainly not bad.

Because Flying Gem is currently unavailable in Gen VI I have given it a Scarf, which isn't too bad anyway although the Flying Gem + Acrobatics combination is Archeops best bet. With this he plays a 'Hit + Run' style game as you switch/U-Turn into something that threatens you after dishing out hits. Unfortunately this set doesn't feature a Flying type move, this is because it can't take advantage of Acrobatics the best one turn Flying type attack it learns, you could run Sitrus Berry and hope you can get passed half your HP so you're intact with the 140 Attack avoiding Defeatist but that is very risky and you'll find Archeops a waste on your team. And yes you can carry Roost and Sitrus Berry but let's not forget how frail Archeops is with its poor HP and Defensive stats. You probably won't survive with more than half your HP from any one none resisted hit.

You need the Choice Scarf to ensure that you are out-speeding any none Scarfer on their team as you want to avoid taking hits or your Attack will be reduced to an average 70 base. Naive Nature to take advantage of its Special Attack stat. This set runs the Edge-Quake combination giving it nice coverage and a STABStone Edge. Head Smash is completely overkill, however it contributes towards losing his health activating Defeatist but the combination of the 140 base Attack stat and Head Smash's 150 base power it is going to OHKO anything not resisting it. Or you can use Archeops as a scout and leave dents on the opponent with U-Turn if you don't like the recoil. Heat Wave may seem weird but it helps with Pokemon such as Ferrothorn, Foretress and even things like Scizor.

Unfortunately for Archeops its ability is what kills it and ultimately a Pokemon like Aerodactyl another Flying/Rock type has access to a Mega evolution and doesn't have awful abilities such as Defeatist which definitely doesn't help. I don't think Roost is a viable option with Archeops as you're not going to get the chance to safely Roost a lot and priority Aqua Jets and Bullet Punches from Azumarill, Scizor & Lucario respectively are too common and too much of a problem. I guess with this set you just have to know how and when to use it. High risk high reward.